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Carbon cleaner

H

hairdresser100

Contributing Member
Has anyone used any spray through the carb top end carbon clean on their motors? Did you have good or bad results? I guess most would call this a seafoam cylinder cleaning.

I have carb Honda 90's and was thinking of using some CRC de-carbon spray before changing my old spark plugs out for the season .......but I have some reservations.

My engines are old with tons of hours...but run well.
 
Haven't done it with my Honda, but did with an abused Suzuki 140 two-stroke. Mixed a gallon of fuel with a pint of Sea Foam, run 15 minutes, sit 15, run 15, sit 15. Did that until the gallon was gone. Checked spark plugs before and after, significantly cleaner afterwards ... :)
 
Somewhere deep in the Honda owners manual, they recommend Yamalube Ring Free. But SeaFoam is probably just as good, if not better. All the marine mechanics around here use it to decarb outboards.
 
I like water. No kidding! I have done it in automotive engines and verified the results with a boroscope. Wasn't my idea either. Many mechanics across this great land decarb engines with water everyday. Of course, this is not a fuel additive technique but is what I call a "fogging" method. My pappy used to use Berryman's Chemtool or B-12 and squirt it into the carb while jockeying the throttle. The whole shop and 1/2 block down the street would fill up with gagging, white clouds of smoke.

When I got big, I started doing it too until they came out with catalytic convertors. You can damage them with certain chemicals and excess fuel. So, we started using water in a spray bottle. It was cheaper, safer and just as effective as the old B-12.
 
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